102131342402 has 4 divisors (see below), whose sum is σ = 153197013606. Its totient is φ = 51065671200.

The previous prime is 102131342377. The next prime is 102131342429. The reversal of 102131342402 is 204243131201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61946729881 + 40184612521 = 248891^2 + 200461^2 .

It is a super-2 number, since 2×102131342402² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25532835599 + ... + 25532835602.

Almost surely, 2^102131342402 is an apocalyptic number.

102131342402 is a deficient number, since it is larger than the sum of its proper divisors (51065671204).

102131342402 is an equidigital number, since it uses as much as digits as its factorization.

102131342402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51065671203.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 102131342402 its reverse (204243131201), we get a palindrome (306374473603).

The spelling of 102131342402 in words is "one hundred two billion, one hundred thirty-one million, three hundred forty-two thousand, four hundred two".